All I know about this file from FSL is:
"It is just a text file containing the values of the EVs at each time point
arranged as a N by M matrix where N is the number of timepoints (rows)
and M is the number of EVs (columns). It is simply appended (columnwise)
to the design matrix before running the stats."
You should therefore be able to load the file into a MATLAB variable using:
EV=load('confoundevs.txt');
Then, when you set up the GLM, you would include the columns of EV as
additional covariates in the design matrix. You would specify these
as EV(:,1), EV(:,2) etc. As they reflect motion effects, they should
be entered such that they do not get convolved with the HRF.
Best regards,
-John
On 4 January 2012 18:52, Jiansong Xu <[log in to unmask]> wrote:
> Hi, John:
>
> Thanks a lot.
>
> A related question:
>
> Can I use file confoundevs.txt generated by FEAT as covariates for motion correction?
>
> Best Regards
>
> Jiansong
>
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> ===============
> Jiansong Xu, M.D., Ph.D.
> Assistant Professor
> Dept. of Psychiatry
> Yale Medical School
> 1 Church St., Room 729
> New Haven, CT 06519
> Tel: 203-785-5306
> Fax: 203-737-3591
>
>
>
>
>
>
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>
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>
>
>
> On Jan 4, 2012, at 12:15 PM, John Ashburner wrote:
>
>> You should be able to do this as both packages use NIfTI format.
>> You'll need to gunzip the *.nii.gz files first though, as SPM can't
>> work directly with gzipped NIfTI.
>>
>> The FSL data is likely to be 4D, so when you select the volumes in the
>> analysis, change the field in the file selector that normally says "1"
>> to eg "1:1000". This will allow you to specify more than just the
>> first volume within the time series.
>>
>> Best regards,
>> -John
>>
>> On 4 January 2012 16:48, Jiansong Xu <[log in to unmask]> wrote:
>>> Dear All:
>>>
>>> Happy New Year to every one.
>>>
>>> I have a funny question about preprocessing. Can I use SPM5 to analyze the functional data preprocessed by FSL?
>>>
>>> I used FSL for first level analysis. So the raw data was re-aligned, normalized, and smoothed by FSL. Now I want to use SPM5 for stats. It can save me a lot of time if SPM5 can use data preprocessed by FSL.
>>>
>>> Best Regards
>>>
>>> Jiansong
>>>
>>> The information contained in this message may be privileged and confidential. If you are NOT the intended recipient, please notify the sender immediately with a copy to [log in to unmask] and destroy this message. Please be aware that email communication can be intercepted in transmission or misdirected. Your use of email to communicate protected health information to us indicates that you acknowledge and accept the possible risks associated with such communication. Please consider communicating any sensitive information by telephone, fax or mail. If you do not wish to have your information sent by email, please contact the sender immediately.
>>> ===============
>>> Jiansong Xu, M.D., Ph.D.
>>> Assistant Professor
>>> Dept. of Psychiatry
>>> Yale Medical School
>>> 1 Church St., Room 729
>>> New Haven, CT 06519
>>> Tel: 203-785-5306
>>> Fax: 203-737-3591
>
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